抄録
Pervaporation (PV) is an effective separation technique that utilizes membrane technology to selectively extract alcohol from aqueous solutions through hydrophobic MFI (Mobil-Five) membranes. The performance of these zeolite membranes was influenced by polarity and molecular sieving. This study explored the use of hexamethyldisiloxane (HMDSO) for post-treatment of MFI membranes to enhance their surface properties and separation efficiency. Evaluating various treatment temperatures revealed that increasing the temperature improved membrane thickness and hydrophobicity, evidenced by decreased alcohol permeance and increased water contact angles. The ethanol-water PV system demonstrated higher permeance than the methanol-water system due to ethanol's lower polarity and better adsorption on hydrophobic membranes. The optimal HMDSO treatment was found at 200 °C for 2 hours, achieving a separation factor of 26.5—approximately double that of untreated membranes—while higher temperatures reduced separation performance. This research highlighted the potential of HMDSO treatment for improving MFI membrane efficiency in PV applications.
https://ror.org/020wjcq07 
